Improvement in lanterns



.J. H. IRWIN.

Lantern.

Patented May 4, 1869 Inven for: %A #M.

Wii ess N. PETERS, Pholo Lillmgmphmz w mm m, n. r:v

J. ii. IRWIN, or onioaeo, 'i'LLiNo'Is.

"IMPROVEMENT 115: LAN-reams,

clear, and exact dcscriptionof the same, refercnce being hadto the accompanying drawings, and the letters and figures marked thereon,

which form part of this specification.

My said-invention consists-in a novel mode;

of constructing a lantern whereby thewind,

, instead of acting upon the 'flanie in such a manner as to extinguish it, serves to support] thereof.

To enable thoseskilled in the art to under- 7 stand how to make and use my said invention,

I will'proceed to describe" the construction and operation of the same, making reference in so doing to the aforesaid drawings, in

Figure 1 represents a vertical central sec tion of my invention; Fig. 2 is a "view of the under side of the flange marked 1 in Fig. 1, and Fig. 3 is a plan section taken at the line min Fig. 1. v

Similar letters of reerence represent the same parts ofmy'iuvenmou in the dilferent figures.

.A represents the oil-cup,-;whieh't'orms also the base of the lantern.- There is no iii-- closure surrounding the samel and it. isprovided with a central tube, (a, intowhich a re movable burner is fitted, as shown.

B represents an annular plate arrongedover the oil-cup, its edges turning down and Hill?- in g with the edge .of theoil-cup, formingem-Ia rchamber, B, said plate B. beingprovide-f vi sh a short central-tube, b, over which an amtl ir flange upon the burner fits, as shown in he drawings. i

' It will be observed that the burner is novided with two flanges, D D, the one fitting I down upon the tube b,and the other fitting closely into the tubea of the oil-cup, said tub essliding in theflan-gessimultaneously as the burner is secured. 3

A wick-tube, T, is arranged withinthe central flange ot' the burner D, which commun cates with the o l-pot," while perforationsv i;i

theyburner'form a' communication opening from the annular air-chamber B into the cone of the bnrner, as clearly indicated in Fig.1.

ers Patent No, 89,7 7 0, dated Mag i, 1869,

Upon the top of the .wiek tube is fixed a passing into the burner, as hereinafter described,- away fronrthe root of the flame is brought in contact with the flame at a short venting the air-current from lifting the flame from the wick and extinguishing the light;

- There is arranged upon'the'burher of the lantern a perforated plate or disk,E, of the same size as the bottom of the globe G, which may-rest upon the same within a vertical rim I 0, formed upon the circumference of said plate or sustain and prevent the extinguishment E, which hus admits the external airinto the passfreely in between the top of the globe and the 'said plate I. v a

The concave plate I is provided at its centerpwith a flange, h, which fits closely upon a vertical tube, H.'s0 as to slide up anddown on said tube, to raise the globe G from the said tube closely, or beingprovided with a sides of the same.

cally opposite each other, any other suitable but said tubes must be arranged in pairs directly opposite each other, and be arranged symmetrically at equal distances'fromveach other, so that. the force of the air-current, striking the flame on one side, shall be exactly counteracted by an equal force upon the op posite side, and thus keep the flame in an upright position, and prevent the extinguishinent thereof when the lantern is swung or oscillated. I Q

When the lantern is atrest and not blown upon by the wind, the air, heated by the flame at the burner, rises in the globe ,and passes P TM flange, t, whi ch'deflectsthe current of air against the walls of the cone, by which the airdis'tance above the base of theflame, thus preglobe, through its perforations, freely and uni-V top of the rim 9, to allow the air and wind toplate E when desired, said flange fitting to suitable spring or catch, to retain the globe at Instead of two tubes F, arranged "names even number of tubes F may be employed,

into the tubes H mien F. --These tubes re; sent a large radiating-surface, and the heatd air is thereby rapidlydeprived of its caloric, so that the slight upward pressure of hot air in the tube H will be sufiicient to insure a downward current of cooled air through the vertical portions of the tubes F F into the airchamber-B and interior of the burner-cone O to supply the flame with oxygen. Fresh air, in' the meantime, passing up through the perforated plate E into the globe, tends to keep the glass cool, and mingles with-the current from the tubes F F. 7

When the lantern is exposed to the wind the blast is distributed by passing through the force of the blast from extinguishing it.

By making the rim 9 with its upper portion .inclined inward, as shown, any current of air,

entering between the plate I and rim 9, would thereby be deflected upward towardthe mou th of thetube H, and this deflection of a moving current of air would produce a current through the tubes F F in the absence of any other cause. Also, when the lantern is swung from side to side, or oscillated, the centrifugal tendency. of

the air in the tubes causes the air to rush into the mouth of the tube H from without, thus producing the required current at the burner.

From the above description it appears that there arethree separate causes to produce a proper current through the tubes F F to the base of the flame, viz.- the ascensive force of the air heated by the burner-flame, and the cooling of said heated air within the tubes;

the pressure of a-moving current deflected to-- ward the mouth of the tube H 5 and the centrifugal effect of swinging or oscillating the lantern. And it will be observed that either the second or third caus'es'will always be cumulative with the first, to produce an in creased current at exactly the time when an increased supply is demanded in consequence of atmospheric disturbances in the immediate vicinity of the lantern.

Movable rings may be placed upon the tubes,

where only two tubes are employed, or even if more tubes are used, to serve as aguard for the globe. Having described the construction and operation of my improvement,.I will specify what I claim and desire to secure by Letters Patent: v w

- 1. The combination of the concave plate I,

rim g, or its equivalent, tubes H and F F, and the base'A B of the lantern, substantially in the manner specified and shown.

2. The combination of the globe G, concave plate'I, tubes H and F, and base A B of the lantern, arranged and operating substantially as and for the purpose shown and set forth.

3. The combination of the plate I, tubes F,

flange t upon the top. of the wick-tube, and the globe G, arranged to opera to as set forth.

4. The combination of the perforated plate E, plate I, tubes H F, and t'hebase A B of the lantern, arranged to operate as described, and forthe purpose set forth.

J. H. IR-WlN.

Witnesses:

I W. Ill-DIARIES,

L. L. Comm-N. 

